CN110190935A - A kind of transmission method and device of mobile car networking and the anti-interference decaying in cloud - Google Patents
A kind of transmission method and device of mobile car networking and the anti-interference decaying in cloud Download PDFInfo
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- CN110190935A CN110190935A CN201910527859.0A CN201910527859A CN110190935A CN 110190935 A CN110190935 A CN 110190935A CN 201910527859 A CN201910527859 A CN 201910527859A CN 110190935 A CN110190935 A CN 110190935A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses the transmission methods and device of a kind of mobile car networking and the anti-interference decaying in cloud, including corresponding emitter and relay reception device, setting data frame is the smallest unit of transfer, transmitting terminal is just that each smallest transmission unit selects optimal modulation system and transmission power in the incipient stage of each data frame transfer, and introduce service quality QoS, it is modulated according to different qos requirements, intersymbol signal interference is avoided by the way that suitable circulating prefix-length is arranged, overcome the interference generated between transmission data, and interference superposition is so that the problem of data are attenuated, to meet requirement of the different business to stable channels mobile communication.
Description
Technical field
This application involves mobile communication technology field more particularly to the biographies of a kind of mobile car networking and the anti-interference decaying in cloud
Transmission method and device.
Background technique
When car networking is communicated with cloud, since antenna is multi-direction, multipath, interference will be generated between data by transmitting, and be done
The superposition disturbed influences effective transmission between mobile unit and cloud so that data are attenuated.It is particularly in quick time-varying letter
Road, Doppler effect, subscriber channel feature difference, multi-service differentiation scene in, total feedback delay is bigger, non-ideal letter
Correlation between channel state information and imperfect channel state is smaller, and existing transmission method is difficult to meet mobile requirement.
Summary of the invention
The purpose of the present invention is to provide a kind of mobile car networking and the transmission methods of the anti-interference decaying in cloud and corresponding
Device, device includes emitter and relay reception device, and setting data frame is the smallest unit of transfer, and transmitting terminal is each
The incipient stage of data frame transfer is just that each smallest transmission unit selects optimal modulation system and transmission power, and draws
Enter service quality QoS, be modulated according to different qos requirements, avoids intersymbol by the way that suitable circulating prefix-length is arranged
Signal interference, meet requirement of the different business to stable channels mobile communication.
In a first aspect, the application provides the transmission method of a kind of mobile car networking and the anti-interference decaying in cloud, the method
Include:
It is smallest transmission unit that data frame, which is arranged, in transmitting terminal, determines respective priority level for each smallest transmission unit
With corresponding qos value；
According to priority level and qos value, the inquiry selection corresponding modulation system of each smallest transmission unit；
The mapping table for establishing qos value Yu discrete transmission power level obtains corresponding discrete transmitting according to current QoS value
Performance number；
Estimating carrier frequency first jumps the CSI value of the wireless channel at place；
According to the CSI value of estimation, the quantity of subcarrier and the length of cyclic prefix are set, the length of the cyclic prefix is big
It is extended in the maximum delay of wireless channel；
To mobile relay receiving end pilot signal transmitted；
According to the requirement of the data packet packet loss of the CSI value, transmission services, multicarrier quantity and signal strength or weakness, adaptively
Select a kind of order of modulation；
According to the modulation system and order of modulation of selection, bit data to be transmitted is modulated to information symbol, is passed through
Ofdm system is sent in sequence to mobile relay receiving end according to the discrete transmission power level, by each smallest transmission unit.
With reference to first aspect, in a first possible implementation of that first aspect, the estimating carrier frequency first is jumped
The CSI value of the wireless channel at place includes:
The transmitting terminal CSI value inaccurate by feedback link fetching portion.
With reference to first aspect, in a second possible implementation of that first aspect, adaptively selected a kind of modulation
Order further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
With reference to first aspect, in first aspect in the third possible implementation, the transmission services include:
One of multi-medium data, audio data, video data, text data or several combination.
Second aspect, the application provide the transmission method of a kind of mobile car networking and the anti-interference decaying in cloud, the method
Include:
Mobile relay receiving end determines that data frame is smallest transmission unit, and the setting of each smallest transmission unit is respective excellent
First grade and corresponding qos value；
The information symbol that transmitting terminal is sent is received by antenna, carries out Fast Fourier Transform (FFT), therefrom extracts pilot tone letter
Number；
The timing of the information symbol and local clock is synchronized according to pilot signal, and QoS letter is obtained from pilot signal
Breath；
CSI estimation is carried out to transmission channel after receiving end on the move, is increased according to the value of CSI estimation, the amplitude of subcarrier
The beneficial and described qos value adjusts corresponding gain parameter；
The gain parameter is related to the length of the quantity of subcarrier and cyclic prefix；
The requirement of data packet packet loss, multicarrier quantity and the signal strength or weakness of the value, transmission services estimated according to the CSI,
A kind of adaptively selected order of modulation；
According to the business data packet of last Successful transmissions, the business importance of transmission is obtained, according to the weight of transmission services
The property wanted determines corresponding priority level, according to the sequential selection demodulation mode of priority level from high to low；
According to the demodulation mode of selection, order of modulation and gain parameter, the information symbol received is demodulated into most brief biography
The bit data of defeated unit is reduced into data packet by encapsulating again, passes to the user terminal of receiving side.
It is described on the move after receiving end pair in second aspect in the first possible implementation in conjunction with second aspect
Transmission channel carries out after CSI estimation, further includes:
The channel estimator of mobile relay receiving end side sends the channel estimated to transmitting terminal by feedback link and increases
Benefit, the selection for the modulation system to signal.
In conjunction with second aspect, in second of second aspect possible implementation, adaptively selected a kind of modulation
Order further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
In conjunction with second aspect, in second aspect in the third possible implementation, the transmission services include:
One of multi-medium data, audio data, video data, text data or several combination.
The third aspect, the application provide a kind of emitter applied under mobile context, including processor and for depositing
The memory of the enough computer programs run on a processor of energy storage, wherein the processor is for running the computer journey
When sequence, the step of perform claim requires 1-4 described in any item transmission methods.
Fourth aspect, the application provide a kind of relay reception device applied under mobile context, including processor and use
In the memory for the computer program that storage can be run on a processor, wherein the processor is for running the calculating
When machine program, the step of perform claim requires 5-8 described in any item transmission methods.
The present invention provides the transmission method and device of a kind of mobile car networking and the anti-interference decaying in cloud, including sends out accordingly
Injection device and relay reception device, setting data frame are the smallest unit of transfer, beginning of the transmitting terminal in each data frame transfer
Stage is just that each smallest transmission unit selects optimal modulation system and transmission power, and introduces service quality QoS, root
It is modulated according to different qos requirements, avoids intersymbol signal interference by the way that suitable circulating prefix-length is arranged, overcome biography
The interference generated between transmission of data, and interference superposition is so that the problem of data are attenuated, to meet different business to stabilization
The requirement of channel mobile communication.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, for those of ordinary skills, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of one embodiment of the transmission method of the mobile car networking of the present invention and the anti-interference decaying in cloud；
Fig. 2 is the flow chart of one embodiment of the transmission method of the mobile car networking of the present invention and the anti-interference decaying in cloud.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Fig. 1 is the flow chart of the transmission method of mobile car networking provided by the present application and the anti-interference decaying in cloud, the side
Method includes:
It is smallest transmission unit that data frame, which is arranged, in transmitting terminal, determines respective priority level for each smallest transmission unit
With corresponding qos value；
According to priority level and qos value, the inquiry selection corresponding modulation system of each smallest transmission unit；
The mapping table for establishing qos value Yu discrete transmission power level obtains corresponding discrete transmitting according to current QoS value
Performance number；
Estimating carrier frequency first jumps the CSI value of the wireless channel at place；
According to the CSI value of estimation, the quantity of subcarrier and the length of cyclic prefix are set, the length of the cyclic prefix is big
It is extended in the maximum delay of wireless channel；
To mobile relay receiving end pilot signal transmitted；
According to the requirement of the data packet packet loss of the CSI value, transmission services, multicarrier quantity and signal strength or weakness, adaptively
Select a kind of order of modulation；
According to the modulation system and order of modulation of selection, bit data to be transmitted is modulated to information symbol, is passed through
Ofdm system is sent in sequence to mobile relay receiving end according to the discrete transmission power level, by each smallest transmission unit.
In some preferred embodiments, the CSI value of the wireless channel where the jump of estimating carrier frequency first includes:
The transmitting terminal CSI value inaccurate by feedback link fetching portion.
In some preferred embodiments, adaptively selected a kind of order of modulation further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
In some preferred embodiments, the transmission services include:
One of multi-medium data, audio data, video data, text data or several combination.
Fig. 2 is the flow chart of the transmission method of mobile car networking provided by the present application and the anti-interference decaying in cloud, the side
Method includes:
Mobile relay receiving end determines that data frame is smallest transmission unit, and the setting of each smallest transmission unit is respective excellent
First grade and corresponding qos value；
The information symbol that transmitting terminal is sent is received by antenna, carries out Fast Fourier Transform (FFT), therefrom extracts pilot tone letter
Number；
The timing of the information symbol and local clock is synchronized according to pilot signal, and QoS letter is obtained from pilot signal
Breath；
CSI estimation is carried out to transmission channel after receiving end on the move, is increased according to the value of CSI estimation, the amplitude of subcarrier
The beneficial and described qos value adjusts corresponding gain parameter；
The gain parameter is related to the length of the quantity of subcarrier and cyclic prefix；
The requirement of data packet packet loss, multicarrier quantity and the signal strength or weakness of the value, transmission services estimated according to the CSI,
A kind of adaptively selected order of modulation；
According to the business data packet of last Successful transmissions, the business importance of transmission is obtained, according to the weight of transmission services
The property wanted determines corresponding priority level, according to the sequential selection demodulation mode of priority level from high to low；
According to the demodulation mode of selection, order of modulation and gain parameter, the information symbol received is demodulated into most brief biography
The bit data of defeated unit is reduced into data packet by encapsulating again, passes to the user terminal of receiving side.
In some preferred embodiments, it is described on the move after receiving end to transmission channel carry out CSI estimation after, also wrap
It includes:
The channel estimator of mobile relay receiving end side sends the channel estimated to transmitting terminal by feedback link and increases
Benefit, the selection for the modulation system to signal.
In some preferred embodiments, adaptively selected a kind of order of modulation further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
In some preferred embodiments, the transmission services include:
One of multi-medium data, audio data, video data, text data or several combination.
The application provides a kind of emitter applied under mobile context, including processor and can locate for storing
The memory of the computer program run on reason device, wherein the processor is for executing figure when running the computer program
The step of transmission method described in all or part in 1 embodiment.
The application provides a kind of relay reception device applied under mobile context, including processor and can for storing
The memory of the computer program run on a processor, wherein the processor is for holding when running the computer program
The step of transmission method described in all or part in row Fig. 2 embodiment.
In the specific implementation, the present invention also provides a kind of computer storage mediums, wherein the computer storage medium can deposit
Program is contained, which may include step some or all of in each embodiment of the present invention when executing.The storage medium
It can be magnetic disk, CD, read-only memory (referred to as: ROM) or random access memory (referred to as: RAM) etc..
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
The mode of general hardware platform realize.Based on this understanding, the technical solution in the embodiment of the present invention substantially or
The part that contributes to existing technology can be embodied in the form of software products, which can store
In storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions use is so that a computer equipment (can be
Personal computer, server or network equipment etc.) it executes described in certain parts of each embodiment of the present invention or embodiment
Method.
The same or similar parts between the embodiments can be referred to each other for this specification.For embodiment,
Since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to the explanation in embodiment of the method
?.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (10)
1. the transmission method of a kind of mobile car networking and the anti-interference decaying in cloud characterized by comprising
It is smallest transmission unit that data frame, which is arranged, in transmitting terminal, determines respective priority level and right for each smallest transmission unit
The qos value answered；
According to priority level and qos value, the inquiry selection corresponding modulation system of each smallest transmission unit；
The mapping table for establishing qos value Yu discrete transmission power level obtains corresponding discrete transmission power according to current QoS value
Value；
Estimating carrier frequency first jumps the CSI value of the wireless channel at place；
According to the CSI value of estimation, the quantity of subcarrier and the length of cyclic prefix are set, the length of the cyclic prefix is greater than nothing
The maximum delay of line channel extends；
To mobile relay receiving end pilot signal transmitted；
It is adaptively selected according to the requirement of the data packet packet loss of the CSI value, transmission services, multicarrier quantity and signal strength or weakness
A kind of order of modulation；
According to the modulation system and order of modulation of selection, bit data to be transmitted is modulated to information symbol, passes through OFDM system
Each smallest transmission unit is sent in sequence to mobile relay receiving end according to the discrete transmission power level by system.
2. the method according to claim 1, wherein the estimating carrier frequency first jumps the wireless channel at place
CSI value include:
The transmitting terminal CSI value inaccurate by feedback link fetching portion.
3. method according to claim 1 to 2, which is characterized in that the adaptively selected a kind of order of modulation is also wrapped
It includes:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
4. method according to claim 1 to 3, which is characterized in that the transmission services include:
One of multi-medium data, audio data, video data, text data or several combination.
5. the transmission method of a kind of mobile car networking and the anti-interference decaying in cloud characterized by comprising
Mobile relay receiving end determines that data frame is smallest transmission unit, and respective priority scheduling is arranged in each smallest transmission unit
Grade and corresponding qos value；
The information symbol that transmitting terminal is sent is received by antenna, Fast Fourier Transform (FFT) is carried out, therefrom extracts pilot signal；
The timing of the information symbol and local clock is synchronized according to pilot signal, and QoS information is obtained from pilot signal；
On the move after receiving end to transmission channel carry out CSI estimation, according to CSI estimation value, subcarrier amplitude gain and
The qos value adjusts corresponding gain parameter；
The gain parameter is related to the length of the quantity of subcarrier and cyclic prefix；
It is adaptive according to the value of CSI estimation, the requirement of data packet packet loss, multicarrier quantity and the signal strength or weakness of transmission services
It should select a kind of order of modulation；
According to the business data packet of last Successful transmissions, the business importance of transmission is obtained, according to the importance of transmission services,
Corresponding priority level is determined, according to the sequential selection demodulation mode of priority level from high to low；
According to the demodulation mode of selection, order of modulation and gain parameter, the information symbol received is demodulated into minimum transfer list
The bit data of position, is reduced into data packet by encapsulating again, passes to the user terminal of receiving side.
6. according to the method described in claim 5, it is characterized in that, described on the move carry out transmission channel after receiving end
After CSI estimation, further includes:
The channel estimator of mobile relay receiving end side sends the channel gain estimated to transmitting terminal by feedback link, uses
In the selection of the modulation system to signal.
7. according to any method of claim 5-6, which is characterized in that the adaptively selected a kind of order of modulation is also wrapped
It includes:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
8. according to any method of claim 5-7, which is characterized in that the transmission services include:
One of multi-medium data, audio data, video data, text data or several combination.
9. a kind of emitter applied under mobile context, including processor and for storing and can run on a processor
The memory of computer program, wherein the processor is for when running the computer program, perform claim to require 1-4 to appoint
The step of transmission method described in one.
10. a kind of relay reception device applied under mobile context, including processor and can be on a processor for storing
The memory of the computer program of operation, wherein the processor is for when running the computer program, perform claim to be required
The step of 5-8 described in any item transmission methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910527859.0A CN110190935A (en) | 2019-06-18 | 2019-06-18 | A kind of transmission method and device of mobile car networking and the anti-interference decaying in cloud |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910527859.0A CN110190935A (en) | 2019-06-18 | 2019-06-18 | A kind of transmission method and device of mobile car networking and the anti-interference decaying in cloud |
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| CN110190935A true CN110190935A (en) | 2019-08-30 |
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Cited By (1)
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| CN114679362A (en) * | 2022-04-08 | 2022-06-28 | 中山大学 | Self-adaptive adjustment method for multi-carrier waveform parameters of communication system |
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Application publication date: 20190830 |